1State Key Lab for Tuburlence and Complex Systems, College of Engineering, Peking University, Beijing 100871 2School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081
Effect of Residual Stress on the Magnetoelectric Properties of Terfenol-D/PZT/Terfenol-D Laminates
1State Key Lab for Tuburlence and Complex Systems, College of Engineering, Peking University, Beijing 100871 2School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081
摘要The effect of residual stress on the magnetoelectric properties of terfenol-D/PZT/terfenol-D laminates is studied. The sandwich structure composites with two longitudinally magnetized terfenol-D plates and one transversely polarized Pb(Zr0.52Ti0.48)O3 plate are manufactured under different uniform and constant magnetic fields. The magnetic plates will deform before adhesion. Therefore, residual stress is induced by the mismatched strain between laminates when the magnetic field disappears. The experimental results show that magnetoelectric coefficient is improved about 130% for sandwich structure composites with residual stress. It can be explained that the proposed method can improve the interface mechanical coupling effect. Therefore, the magnetic energy can be transferred effectively to electric energy through the mechanical deformation. At the same time the strain derivative dε/dH is enhanced by residual stress. Thus, the electric polarization response is increased under a same disturbed magnetic field.
Abstract：The effect of residual stress on the magnetoelectric properties of terfenol-D/PZT/terfenol-D laminates is studied. The sandwich structure composites with two longitudinally magnetized terfenol-D plates and one transversely polarized Pb(Zr0.52Ti0.48)O3 plate are manufactured under different uniform and constant magnetic fields. The magnetic plates will deform before adhesion. Therefore, residual stress is induced by the mismatched strain between laminates when the magnetic field disappears. The experimental results show that magnetoelectric coefficient is improved about 130% for sandwich structure composites with residual stress. It can be explained that the proposed method can improve the interface mechanical coupling effect. Therefore, the magnetic energy can be transferred effectively to electric energy through the mechanical deformation. At the same time the strain derivative dε/dH is enhanced by residual stress. Thus, the electric polarization response is increased under a same disturbed magnetic field.
2012, Vol. 29 
